#region Apache License
//
// Licensed to the Apache Software Foundation (ASF) under one or more 
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership. 
// The ASF licenses this file to you under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with 
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#endregion

// MONO 1.0 has no support for Win32 OutputDebugString API
#if !MONO
// SSCLI 1.0 has no support for Win32 OutputDebugString API
#if !SSCLI
// We don't want framework or platform specific code in the CLI version of log4net
#if !CLI_1_0

using System.Runtime.InteropServices;

using log4net.Core;

namespace log4net.Appender
{
  /// <summary>
  /// Appends log events to the OutputDebugString system.
  /// </summary>
  /// <remarks>
  /// <para>
  /// OutputDebugStringAppender appends log events to the
  /// OutputDebugString system.
  /// </para>
  /// <para>
  /// The string is passed to the native <c>OutputDebugString</c> 
  /// function.
  /// </para>
  /// </remarks>
  /// <author>Nicko Cadell</author>
  /// <author>Gert Driesen</author>
  public class OutputDebugStringAppender : AppenderSkeleton
  {
    #region Public Instance Constructors

    /// <summary>
    /// Initializes a new instance of the <see cref="OutputDebugStringAppender" /> class.
    /// </summary>
    /// <remarks>
    /// <para>
    /// Default constructor.
    /// </para>
    /// </remarks>
    public OutputDebugStringAppender()
    {
    }

    #endregion // Public Instance Constructors

    #region Override implementation of AppenderSkeleton

    /// <summary>
    /// Write the logging event to the output debug string API
    /// </summary>
    /// <param name="loggingEvent">the event to log</param>
    /// <remarks>
    /// <para>
    /// Write the logging event to the output debug string API
    /// </para>
    /// </remarks>
#if NET_4_0 || MONO_4_0 || NETSTANDARD
    [System.Security.SecuritySafeCritical]
#endif
#if !NETCF && !NETSTANDARD1_3
    [System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Demand, UnmanagedCode = true)]
#endif
    protected override void Append(LoggingEvent loggingEvent)
    {
#if NETSTANDARD
      if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
      {
        throw new System.PlatformNotSupportedException("OutputDebugString is only available on Windows");
      }
#endif

      OutputDebugString(RenderLoggingEvent(loggingEvent));
    }

    /// <summary>
    /// This appender requires a <see cref="Layout"/> to be set.
    /// </summary>
    /// <value><c>true</c></value>
    /// <remarks>
    /// <para>
    /// This appender requires a <see cref="Layout"/> to be set.
    /// </para>
    /// </remarks>
    protected override bool RequiresLayout
    {
      get { return true; }
    }

    #endregion // Override implementation of AppenderSkeleton

    #region Protected Static Methods

    /// <summary>
    /// Stub for OutputDebugString native method
    /// </summary>
    /// <param name="message">the string to output</param>
    /// <remarks>
    /// <para>
    /// Stub for OutputDebugString native method
    /// </para>
    /// </remarks>
#if NETCF || NETSTANDARD
    [DllImport("CoreDll.dll")]
#else
    [DllImport("Kernel32.dll")]
#endif
    protected static extern void OutputDebugString(string message);

    #endregion // Protected Static Methods
  }
}

#endif // !CLI_1_0
#endif // !SSCLI
#endif // !MONO
